some gctm methods in translator object before Lua Close

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What steps will reproduce the problem?
1. In multithread environment, CLR gc will collect some gctm methods in 
translator object before Lua Close.

Please provide any additional information below.

        #region IDisposable Members

        public virtual void Dispose()
        {
            if (translator != null)
            {
                translator.pendingEvents.Dispose();
                translator = null;
            }

            this.Close();
            System.GC.Collect();
            System.GC.WaitForPendingFinalizers();
        }

        #endregion

modify as below:

        #region IDisposable Members

        public virtual void Dispose()
        {
            if (translator != null)
            {
                translator.pendingEvents.Dispose();
            }

            this.Close();
            translator = null;
            System.GC.Collect();
            System.GC.WaitForPendingFinalizers();
        }

        #endregion

can correct this problem.

Original issue reported on code.google.com by caoshi...@gmail.com on 5 Jan 2012 at 8:02